Proline Promass 80
Wiring
Hauser
29
4.2.3
HART connection
Users have the following connection options at their disposal:
• Direct connection to transmitter by means of terminals 26(+) / 27(
)
• Connection by means of the 4 to 20 mA circuit
!
Note!
• The measuring circuit's minimum load must be at least 250
.
• The CURRENT SPAN function must be set to "4–20 mA" (individual options see device function).
• See also the documentation issued by the HART Communication Foundation, and in particular
HCF LIT 20: "HART, a technical summary".
Connection of the HART handheld communicator
See also the documentation issued by the HART Communication Foundation, and in particular
HCF LIT 20: "HART, a technical summary".
a0004586
Fig. 23:
Electrical connection of HART handheld terminal
1
HART handheld terminal
2
Auxiliary energy
3
Shielding
4
Other switching units or PLC with passive input
Connection of a PC with an operating software
In order to connect a PC with operating software (e.g. FieldCare), a HART modem
(e.g. Commubox FXA195) is needed.
a0004592
Fig. 24:
Electrical connection of a PC with operating software
1
PC with operating software
2
Auxiliary energy
3
Shielding
4
Other switching units or PLC with passive input
5
HART modem, e.g. Commubox FXA195
+26
-27
4
2
³
W
250
1
3
+26
³
W
250
–27
1
2
3
5
4
